Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.

[ Fixes ]Fixes and patches

• nodemailer 10.0.5Fixed version · GitHub Advisories · npm package nodemailer: upgrade to 10.0.5 or later (affected >= 9.1.0, <= 10.0.4)

[ Packages ]Affected open-source packages

• nodemailer npmAffected >= 9.1.0, <= 10.0.4 · fixed in 10.0.5 · GHSA-prgh-xp8r-p3m5

[ References ]References

• github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5vendor-advisory
• github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89patch
• github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.tstechnical-description
• github.com/nodemailer/nodemailer/releases/tag/v10.0.5release-notes
• github.com/nodemailer/nodemailerproduct
• www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quad…third-party-advisory